Riveting machine



J. ADT.

RIVBTING MACHINE. f No. 68,680, Patented Sept. 10, 1867.

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JOHN ADT. OF W'OLGOTTVILLE, CONNECTICUT.

Letters Parent .Na 68,680, dated September 10. 1867.

IMPROVEMENT IN 'RIVETINGMACHINE fdilge Siphon referti-tf tu in ttusvegettus @nicht nnrnutinmnrt nf tige smut,

TO ALL WHGM I'l MAY CONCERN Be it known that I, .TDHN ADT, ofWolcottville, in the county of Litchfield, and State of Connecticut,have invented certain new and useful improvements in Riveting Machines;and I do hereby declare that the i`ol-y lowing is a full, clear, andexactdcscription of the same, reference being had to the accompanyingdrawings muknga portion of this specification, in whichr Figure 1 is aplan or thp t'iew of a riveting machine constructed according to myinvention.

Figure 2 is a vertical longitudinal section ofthe saine.

Figure 3 is n. vertical transverse section, taken in the line a: x infigs. 1 and 2.

Similar letters of reference indicate corresponding parts in all thefigures.

The object of this invention is to provide a means whereby rivets may besimultaneously headed at. both ends, as is required, for instance, inthe manufacture of furniture-casters and other like articles.

VThe invention consists in two riroting-ha-mniers, so combined andoperated as to strike simultaneously upon the two opposite ends of therivet, 'such rivet being, es it were, supported by each hammer againstthe stroke or impact of the other. The invention further' consists i theemployment of suitable springs within the sleeves in` which are situatedthe aforesaid hammers wherebyr the `blows of the hammers Vduringtheriveting operation' are rendered much more efficient than would b'e thecase ii` such springs were dispensed with. The invention furtherconsists in the combination with the"hommer`s of suitable supportingcarriages and operating cams, whereby not only may the requiredreciprocating movementA he communicated to such hammers, but wherebythey may also be adjusted at any distance apart that the exigencias oflthe work may necessitate. The inven-` tion further consists' incertainnovel me' ns whereby'the working parts of the machine may, with verygreat *,fccility, he brought and retained in position for heading rivetsof different lengths.

To enable others to understand` the construction and operation of myinvention, I will proceed to describe it with reference to the drawings.Y i

The supporting framev of the machine is shown at A, and is constructedwith longitudinal guides a, which receive two sliding carriages B.Situated. longitudinally upon the upper side of cach of the carriages IB, and working in suitable bearings formed thereon, is a cylindricalsleeve, C, placed upon which, and held in position by annular Hongos a',is a collar, In., from which a stud, (1*, extends. downward through aslot, la', formed longitudinally in thel top of the carriage, and hasits extremity fitted into a com groove, c, provided in a cam-wheel, 0*,which is arranged upon a longitudinal shaft, d, extending from one cndofthe frame A tothe other, underA neath the aforesaid carriages, asshown more. fully in iig. 2. Eachof the cam-wheels C* is attached to theshaft d by means of an internal feather, c', fitting into a longitudinalgroove, c,in the shaft d, in such manner that the said cam-wheel, whenrotating with the shaft, will h c free to slido'thercon, the upper sideof the cam* wheel being furthermore so fitted into a suitable recess, inthe under sido of the carriage B above it, that a slid4 in g movement ofthe carriage will communicates. corresponding movement to thecnn1-\\'heel, in order that suchcarriage and cum-wheel may he retainedin their proper relative positions during` thc operation ot' themachine; Each of thc cam-wheels just mentioned' is connected with thesleeve C above it by ineens ci' a band, c, extends l ing from a smallpulley, f, lformed upon thcend of vthc couru-heel to u. similar pulley,f, provided upon the sleeve. Euch of the sleeves C is provided at'itsends with cups g, formed centrallyifin which are holes through whichextend the end-s of the sliding-hammer D, which is situated within thesleeve, and isV furnishedht itsr central part. with au annular rib, 7i.'iwospiral springs, marked respectively e* and gif, are situated, oneupon l each end portion ofthe hammer, between the central annular ribthcreofjust mentioned :und the closed ends of t-hc sleeves; the saidsprings tending to bring the hammer, with its rib h, at or near thecentral part of the sleeve,

- as shown in tig. 2, and the purpose of which will he hereinafter fullyset forth. T'he inner ends of the hammers D are bevelled oii` upon eachside,4so that the face-thereof is made comparatively narrow inproportion to its length. Placedbetween-thc outer ends of the carriagesB, and the adjacent ends of the frame A, are spiral springs z', whichact to draw the carriages outward toward the said ends of the frame.Extending inward from` the carriages and downward over pulleys m are twostraps u, thc lower ends of which u-rc attached to u. treadle, E, insuoli n. way that when the treadle is `forced downwards the carriages,and consequently the hammers D rcarried thereon, will be caused toapproach e'ach other, as is required in bringing the said hammers inconvenes, 68o 2.

ient proxlmity to the work. Findicates adjustable stop-plates, which aresecured to the upper side of the franie'A, being attached thereto byscrews m', passing downward through long kslots n." formed in the saidplates, so that' by these means the plates may be adjustedlongitudinally when desired; the said plates being furnished at theirends with inivardly projecting spurs r, which limit the movement ineither dreeton of the contiguous carriage B. Situated transversely 'atthe centre of the frame A, between the inner ends of the hammers D, is arest, G, the oieeof which is to support the article to be riveted, andthe upper surface of ivhieh may be of any shape required toseoure theretention of such article during the riveting operation.

In using the machine a rotary motion is given to the shaft d, throughthe agen'ey of a suitable band-wheel, I, and the article to be rivetedis placed upon the rest-G, with the rivet. itself in line with thohammers D, whereupon the treadle E is pressed' downward until thecarriages are brought against the innermost spurs i' Yofthe stop-platesF,'wlich, having been previously adjusted, stop thesaidV carriages, inthat posit-ion in which the hammers will be brought to the requireddistance from the ends ofthe rivet. The sleeves C, and conscquently thehammers D, placed therein, receive a reciprocating motion 'throughthe'ageney of the grooves c, and at their inward strokes strikesimultaneously upon the two oppositeA ends of the rivet to upset or headthe same, such simultaneous operation of the hammers enabling the strokeof one to balance, as it were, that of the other, so that one hammerserves to support the rivet against the impact ofthe opposite one.

Inasmuch as the bands c partially rotate the hammers at each stroke, itfollows that the narrow ends or faces oifsueh hammers are turned into adiiTercnt position, and consequently act upon different portions of .theends ofthe rivet at each blow, the said ends being thu-s more uniformlyand evenly turned over er upset than is found practicable with hammersmade with circular faces, and having lsimply a longitudinal or vibratingmovement, at vthe same timetliat the springs e* y* being compressed, oneat eaeh inward and outward movement of the hammers, tend to bring thesaid hammers to the position shown lin fig- 2, and hereinbeforeexplained. The motion of the aforesaid hammers i's'rendercd much moresteady than'would be the ease if they were operated by the cams C*alone, and the efiiceny of their laction in riveting','is, ,of course,proportionally increased. The rivetihaving been thus headed at bothends, the treadle E is released, whereupon the springs z' draw fartherapart the carriages B, and the riveted article being superseded upon'therest G, by a similar one, the riveting operation is repeated.'

What I claim as my invention, and desire to secure by Letters Patent,is-

1. The two hammers D, so combined andoperated as to simultaneouslystrike the two ends ofthe rivet in heading the same, by meanssubstantially as herein set forth. i

2. The combination, with the reciprocating hammers D, -of sleeves C andsprings e* ,r/"t, the whole arranged to operate substantially as and forthe purpose herein set forth. I

3. The comliination of the cam-wheels C* and cai-rages B with thereciprocating hammers 1J. constructed and operating substantially as andfor the purpose herein set forth..

4. The adjustable stop-plates F, in combination with the carriagescarrying the rivctlng-hammcrs, substantially als and for the purposeherein set forth. i l

i JOHN ADT.' Witnesses:

'.Inos. A. ELLIOTT,

F. S. HUNGERFORD.

